<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索添加商品区域 -->
      <el-row :gutter="20">
        <!-- 搜索 -->
        <el-col :span="8">
          <el-input
            placeholder="请输入内容"
            v-model="queryInfo.query"
            clearable
            @clear="getGoodsList"
          >
            <el-button
              slot="append"
              icon="el-icon-search"
              @click="getGoodsList"
            ></el-button>
          </el-input>
        </el-col>
        <!-- 添加 -->
        <el-col :span="4">
          <el-button type="primary" @click="goAddPage">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- table 表格区域，显示商品信息 -->
      <el-table :data="goodslist" border stripe>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <!-- 商品信息列表 -->
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column
          label="商品价格"
          prop="goods_price"
          width="95px"
        ></el-table-column>
        <el-table-column
          label="商品重量"
          prop="goods_weight"
          width="70px"
        ></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="140px">
          <!-- 调用全局自定的时间过滤器，格式化时间 -->
          <template slot-scope="scope">{{
            scope.row.add_time | dataFormat
          }}</template>
        </el-table-column>
        <el-table-column label="操作" width="180px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.goods_id)"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeById(scope.row.goods_id)"
              >删除</el-button
            >
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background
      ></el-pagination>
    </el-card>

    <!-- 编辑修改商品对话框 -->
    <el-dialog
      title="修改商品"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="editForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
          <el-input v-model="editForm.goods_price"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input v-model="editForm.goods_weight"></el-input>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number">
          <el-input v-model="editForm.goods_number"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 查询的请求参数对象
      queryInfo: {
        // 商品搜索参数
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 一页中的商品信息数组, 用于渲染商品列表
      goodslist: [],
      //  所有商品的总数
      total: 0,
      // 控制修改商品对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }]

      }
    }
  },
  created () {
    this.getGoodsList()
  },
  methods: {
    //   根据分页获取对应的商品数据
    async getGoodsList () {
      const { data: res } = await this.$http.get('goods', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品信息失败！')
      }
      //   console.log(res.data);
      //   this.$message.success('获取商品信息成功！')
      //   保存获取到的数据
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    // 每页显示的数量发生变化时触发，更新显示情况
    handleSizeChange (newSize) {
      // 更新每页显示的数据条数
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 当前位于的页码值发生变化时触发，更新显示情况
    handleCurrentChange (newPage) {
      // 更新页码值
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 根据 id 查询商品
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`goods/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('查询商品信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改商品对话框关闭事件，重置对话框内容
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息并提交
    editInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(`goods/${this.editForm.goods_id}`, {
          goods_name: this.editForm.goods_name,
          goods_price: this.editForm.goods_price,
          goods_number: this.editForm.goods_number,
          goods_weight: this.editForm.goods_weight
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新商品信息失败！')
        }
        this.editDialogVisible = false
        this.getGoodsList()
        this.$message.success('更新商品信息成功！')
      })
    },
    // 根据商品 id 删除对应商品
    async removeById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(error => error)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除操作！')
      }
      const { data: res } = await this.$http.delete(`goods/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除商品失败！')
      }
      this.$message.success('删除商品成功！')
      this.getGoodsList()
    },
    // 跳转到添加商品页面
    goAddPage () {
      this.$router.push('/goods/add')
    }
  }
}
</script>

<style lang="less" scoped>
</style>
